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Dormer MTT-X E025/MTT-X E035 Powdered Metal Spiral Point Threading Tap, Gold Oxide Finish, Round Shank With Square End, Plug Chamfer

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Product Specifications
Surface Coating
Gold Oxide
Shank Type
Round With Square End
Material Type
High Speed Steel
UNSPSC Code
27112806
Chamfer Type
Plug
Brand Name
Dormer

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Thread Size Thread Type Manufacturer Series # Number of Flutes Shank Diameter Length of Threads Overall Length Pitch Diameter Limit Mfr Part # ASIN

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Currently showing 1-20 of 37 Next 17 »
#6-32 UNC E025 2 0.141" 0.261" 2" H2 581070 B003JY6KP8 1 $12.10 Buy Options
#6-40 UNF E035 2 0.141" 0.261" 2" H2 581957 B003JY6M4W 2 $13.95 Buy Options
#8-32 UNC E025 2 0.168" 0.2484" 2.125" H2 581087 B003JY6KQW 1 $12.10 Buy Options
#8-36 UNF E035 2 0.168" 0.2484" 2.125" H2 581964 B003JY6M6K 1 $13.95 Buy Options
#10-24 UNC E025 2 0.194" 0.4303" 2.375" H3 581094 B003JY6KKS 1 $12.10 Buy Options
#10-32 UNF E035 2 0.194" 0.4303" 2.375" H2 581971 B003JY6LZ2 6 $12.30 Buy Options
#12-24 UNC E025 2 0.22" 0.4173" 2.375" H3 581100 B003JY6KLC 2 $13.75 Buy Options
#12-28 UNF E035 2 0.22" 0.4173" 2.375" H3 581988 B003JY6M10 2 $13.95 Buy Options
1/4"-20 UNC E025 2 0.255" 0.5075" 2.5" H3 581117 B003JY6KJE 1 $12.10 Buy Options
1/4"-20 UNC E025 3 0.255" 0.5075" 2.5" H3 581124 B003JY6KK8 2 $12.10 Buy Options
1/4"-28 UNF E035 3 0.255" 0.5075" 2.5" H3 582008 B003JY6LYI 4 $12.30 Buy Options
1/4"-28 UNF E035 2 0.255" 0.5075" 2.5" H3 581995 B003JY6LXY 1 $12.30 Buy Options
5/16"-18 UNC E025 2 0.318" 0.5939" 2.7188" H3 581131 B003JY6KNK 1 $13.25 Buy Options
5/16"-18 UNC E025 3 0.318" 0.5939" 2.7188" H3 581148 B003JY6KO4 1 $13.25 Buy Options
5/16"-24 UNF E035 3 0.318" 0.5939" 2.7188" H3 582022 B003JY6M3S 2 $13.45 Buy Options
5/16"-24 UNF E035 2 0.318" 0.5939" 2.7188" H3 582015 B003JY6M38 1 $13.45 Buy Options
3/8"-16 UNC E025 2 0.381" 0.602" 2.9375" H3 581155 B003JY6KMG 1 $15.70 Buy Options
3/8"-16 UNC E025 3 0.381" 0.602" 2.9375" H3 581162 B003JY6KN0 1 $15.54 Buy Options
3/8"-24 UNF E035 3 0.381" 0.602" 2.9375" H3 582046 B003JY6M2O 3 $15.90 Buy Options
3/8"-24 UNF E035 2 0.381" 0.602" 2.9375" H3 582039 B003JY6M1U 1 $15.31 Buy Options

Key Features

  • Spiral point and straight flutes for cutting threads in through holes
  • Spiral point pushes chips ahead of tool to reduce clogging
  • Powdered-metal steel for performance approaching that of solid carbide tools, with the toughness and shock-resistance of high-speed steel
  • Gold oxide finish reduces grinding stress within the tool
  • Available in UNC (Unified Coarse) and UNF (Unified Fine) right-hand thread options for different applications

Product Description

The Dormer MTT-X E025/MTT-X E035 powdered-metal steel spiral point tap has a round shank with a square end, gold oxide finish, and a plug chamfer, and is used to create right-hand threads in a range of materials, with best performance in steel, copper, brass, aluminum, and magnesium. It is available in two different ANSI thread specification standards: UNC (Unified Coarse) and UNF (Unified Fine). The spiral point of this tap (sometimes referred to as a “gun tap”) pushes chips ahead of the tool and the straight flutes reduce clogging. Both characteristics make it suitable for threading through holes (extending through the workpiece). Gold oxide is a low-temperature heat treatment that reduces grinding stress within the tool. A plug chamfer distributes cutting to ease tapping at the beginning of the hole and to maintain correct perpendicular alignment with the workpiece.

Right-hand threads are designed to tighten when a head or nut is rotated clockwise (the most common threading direction). Powdered-metal steel offers performance that approaches that of solid carbide tools but with the toughness and shock-resistance of high-speed steel. The round shank with square end helps to minimize rotation in the tool holder. This tool can be used in machines, such as drill presses or lathes, or with hand tools such as tap wrenches.

In the Dormer MTT-X E025/MTT-X E035 series, taps in machine screw sizes 6 to 12 have two flutes, taps with nominal diameters of 1/4” to 3/8” are available with two or three flutes, taps with a nominal diameter of 7/16” have three flutes, those with nominal diameters of 1/2” are available with two or three flutes, and those with nominal diameters of 9/16” to 1” have three flutes. All taps in both series have plug chamfers. This tap conforms to ANSI standards and can create threads to a depth two-and-a-half times its diameter. It is suitable for the 3B tolerance class: 3B produces close-tolerance fasteners that resist loosening, as in aerospace applications.

Taps produce internal threads in previously formed holes and can be used in machines (such as drill presses) or with hand tools. Common types of taps include hand taps, spiral point taps, spiral flute taps, thread forming taps, and pipe taps. Hand taps (straight-flute taps) collect chips in the straight flutes of the tool; spiral point taps push chips through holes ahead of the tool; and spiral flute taps pull chips back from the tip of the tool, up and out the hole. Thread forming taps, also known as cold forming taps, press rather than cut to create threads in a drilled hole, and no chips are created. Pipe taps create threads in pipes and pipe fittings. Each thread type designates a thread profile and each type is identified with an abbreviation. In the U.S. and Canada, the Unified Thread Standard is the dominant thread type, including UNC (Unified Coarse), UNF (Unified Fine), and NPT (National Pipe Taper) threads, among others.

Precision Dormer manufactures cutting tools under the following brands: Precision Twist, Dormer, and Union Butterfield. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.

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